2001XJWeekender

2001 XJ Sport 4x4 4.0HO 168K miles.

Last year I replaced the injectors to the Ford Mustang type, replaced the alternator, the TPS, reset the ECU, and added a rockit air filter. Earlier this year I replaced the upstream o2 sensors (did not reset the ECU).

Jeep is not my daily driver, but I have definitely done at least 50 cold start to operating temperature runs so that the ECU could learn the O2 sensor readings.

However, yesterday for the NC state inspection I was denied because the O2 sensors and the Evap System are "Not Ready".

Registration is now expired, so I am risking driving it to work and back. Do I have to drive it, or could I just let it run from cold to 210F in the driveway? Is there a way to know without taking it in to the inspection station so I am not wasting my precious time scheduling an inspection?

Any advice?



K

TigerXJ

I don't really have any advice, but when my jeep failed one year in NC, if I got it back to passing within 30 days, I didn't have to pay for the inspection again

2001XJWeekender

I only drove about 4 miles from a cold start at home to the inspection station.


Excerpt taken from http://www.obdii.com/articles/OBDII_...s_Testing.html

READINESS FLAGS

An essential part of the OBD II system are the "readiness flags" that indicate when a particular monitor is active and has taken a look at the system it is supposed to keep watch over......

To set the converter monitor, for example, the vehicle may have to be driven a certain distance at a variety of different speeds......

As a general rule, doing some stop-and-go driving around town at speeds up to about 30 mph followed by five to seven minutes of 55 mph plus highway speed driving will usually set most or all of the monitors (the converter and EVAP system readiness monitors are the hardest ones to set).....

The Environmental Protection Agency (EPA) realized this shortcoming in current generation OBD II systems. So, when it created the rules for states that want to implement OBD II testing in place of tailpipe dyno testing, it allows up to two readiness flags to not be set prior to taking an OBD II test on 1996 to 2000 vehicles, and one readiness flag not to be set on 2001 and newer vehicles.


Next week I will reschedule and drive around 30 miles city/highway prior to inspection. Will post up again if that resovles it.



K

2001XJWeekender

Yep, passed.

K

Grandpaswagon

Did you just have to drive it around for a while to get everything working?